Typewriter attachment



March 19, 1935. w. R. BARKER 1,995,087

TYPEWRITER ATTACHMENT Filed July 26, 1933 3 Sheets-Sheet 2 Mix-ch 19, 1935. w. R. BARKER 1,995,087

TYPEWRI TER ATTAC HMENT Filed July 26, 1933 5 Sheets-Sheet 3 Patented Mar. 19, 1935 UNITED STATES PATENT OFFICE TYPEWRITER ATTACHMENT Application July 26, 1933, Serial No. 682,327

14 Claims.

This invention relates to typewriters adapted to fill in forms on continuous-form stationery, and more particularly to an improved device for holding carbon strips interleaved with the stationery while the completed forms are advanced beyond the areas served by the carbons.

The primary purpose of the present invention is to provide a carbon-holder which is pivotally mounted on the shiftable platen carriage so as to move forward with the stationery when advanced by the platen roll and associated pressermeans, and to provide means for latching the carbon-holder in its rearmost position to facilitate the transfer of the carbon from an advanced a to a succeeding set of forms.

A further object of the invention is to provide a machine with a movably mounted finger which is adapted to be automatically actuated by the stationery and serves to release the latching means of the carbonholder.

Another object of the invention is to provide an improved method of manipulating interleaved carbon-strips in continuous-form stationery.

The present invention is an improvement on co-pending application of Louis Jensen, Ser. No. 677,114, filed June 22, 1933.

The invention is illustrated in a preferred embodiment in the accompanying drawings, in which:

Fig. 1 is a side elevational view of a machine embodying the invention showing the carbonholder in locked position; Fig. 2, a fragmentary side elevational view of the same in unlocked position; Fig. 3, a broken plan view of the carbonholder supporting mechanism taken as indicated at line 3-3 of Fig. 1; Fig. 4, a broken perspective view of the same; Fig. 5, a broken side elevational view of the attachment with the carbon-holder in its foremost position; Fig. 6, a detail sectional 40 view of part of the release mechanism; Fig. '7, a broken plan view of the attachment; Fig. 8, a fragmentary sectional view taken as indicated at line 8 of Fig. 7; Fig. 9, a broken perspective view of a portion of the release mechanism; and Fig. 10, a broke plan view of the stationery adapted to operate/the release mechanism.

Referring to the drawings, A designates -the main frame of a typewriter machine; B, a shiftable platen carriage equipped with a platen roll B; and C, a typewriter attachment mounted on the carriage B and equipped with an automatic release mechanism C. a

The frame A may be of the well-known con,- struction and is equipped with a transversely shiftable platen B in which the platen roll 13' is (Cl. 197-126A) rotatably mounted. Suitable presser-means are provided for pressing stationery strips 10 against the platen roll so that when the roll is turned, the stationery will be fed thereby.

As shown in Fig. 8, the platen carriage supports a pair of downwardly extending arms 11 which are held in position by means of screws 12. A U-shaped member 13 is rigidly connected to the lower portion of the arms 11 and provides journals for a rock shaft 14. The member 13 also provides journal members 15 having forwardly and upwardly extending guide fingers 15. The rollers 16 are mounted on pintles 17 which are journaled in the members 15. A yoke 18 is also rigidly connected to the arms 11, near its midsection, by spot welding or other suitable means. The oscillatable portion of the typewriter attachment comprises a cross-member 19 which supports, at each end, a pair of upwardly extending pins 20 on which carbon-supporting blades 21 may be mounted. The carbon-supporting blades may be of the well known type now in general use. A guide plate 22 is rigidly secured to and extends rearwardly from the member 19. The member 22 is provided at its end portions with upwardly extending guide members 23 and upwardly extending supporting fingers 24, in which a guide roller 25 is journaled. The cross-member 19 is further provided with downwardly and forwardly extending supporting arms 26 which are pivotally mounted on the rock shaft 14. It will be understood that the rearward travel of the arms 26 will be limited by the yoke 18. A torsion spring 27 is provided on the shaft 14 and urges the arms to their rearmost position.

In order that the arms 26 may be latched in their rearmost position, a simple locking mechanism is provided which comprises a U-shaped member 28 which is pivotally mounted on supporting brackets 29, which extend forwardly from the arms 11. The rearwardly extending portions of the member 28 comprise triggers 30 having cutaway portions to provide shoulders 31 which lie in the path of studs 32 mounted on the arms 26. A small tension spring 33 is provided to raise the triggers into locking position. The member 28 is provided at its front end with an upwardly extending actuating arm 28* so that when the arm is moved rearwardly, the triggers are depressed from locking position. In order that the triggers will not return to the locking position when the arm 28 is released, spring catches 34, having cutaway portions 35, are mounted on the arms 26 by means of rivets 36. The triggers 30 are provided. with outwardly extending studs 37 which are adapted to snap under the spring catches 34 and hold the mechanism unlocked (as shown in Fig. 2) until the arms 26 are drawn upwardly as shown in Fig. 5.

A transversely extending rail 40 is mounted on brackets 41 which are connected to the main frame of the typewriter. This rail is engaged by rollers 16 and fingers and provides a sliding support for the attachment. While it ispreferred to provide this support, it will be understood that it may be dispensed with if desired.

The release mechanism C comprises a rock shaft 42, which is journaled in forwardly extending journal members 43 connected to the arms 11, and is equipped at its outer ends with upwardly and rearwardly extending fingers 44 which are adapted to engage perforations 10 in the stationery strips 10. The pins may be adjustably connected to the shaft 42 by means of blocks 44 equipped with set screws 44. The rock shaft 42 is further provided with a downwardly extending arm 45, adapted to engage the arm 28*. The arm 45 may be connected to the shaft 42 by means of a block 46 equipped with set screws 46, as shown in Fig. 6.

The arms 11 also support U-shaped guide members 47, whose lower portions provide journals for a rock shaft 48. To the ends of the rock shaft 48 are rigidly connected guide-roll supporting arms 49, by means of set screws 49 which carry a rotatably mounted guide roll 50. The shaft 48 is further equipped with a torsion spring 51 which urges the guide roll 50 clockwise. The guide roll serves to direct the stationery into engagement with the fingers 44.

As shown in Fig. l, the stationery strips may be led from a suitable source of supply in the rear of the machine over guide roll 25, between the carbon strip supporting blades 21, beneath the guide-roll 50 into the platen roll'and associated presser means. The upwardly extending guide members 23 and 47 serve to position the stationery laterally and the perforations 10 in the stationery are positioned so as to engage the fingers 44 and draw them forwardly when the stationery is advanced by rotation of the platen roll B. Thus it will be understood that the latch will be automatically released by the stationery and the carbon-holder will be permitted to swing forwardly with the stationery to the position shown in Fig. 5. This will allow ample room for a form to be filled in. After a form has been completed, the stationery is backed out of the machine and the carbon-holder will be swung back into the locking position shown in Fig. 1. The operator may then grasp the forward ends of the strips, lift them upwardly so as not to engage the pins 44, and draw the paper forwardly so as to strip the carbons back into the next succeeding set of forms. The completed set of forms may then be detached and the next set fed back into the machine. As pointed out above, the stationery will again engage the pins 44 and release the carbon-holder for forward movement therewith. The releasing operation is performed automatically by the forward movement of the stationery.

The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible, in view of,

the prior art.

What I regard as new, and desire to secure by Letters Patent, is:

1. In combination with a typewriter equipped with a platen-roll, and a forwardly movable carhon-holder disposed back of said platen-roll: a latch-device operative to latch said carbonholder in retracted position, and an associated stationery-actuated trip therefor.

2. Mechanism as specified in claim 1, in which said trip is equipped with .an actuating finegr adapted to enter successiveperforations in continuous-form stationery and be actuated thereby.

3. Mechanism as specified in claim 1, in which the latch-device comprises a rock-member equipped with a latch-arm and an actuating-arm. and the trip comprises a rock-member equipped with perforation-engaging fingers and an arm for actuating said actuating-arm.

4. In combination: a typewriting machine comprising a main frame and a transversely shiftable carriage equipped with a platen roll around which continuous-form stationery having perforations may be fed, a carbon-holder pivotally mounted on an extension of said carriage; latch ing-means for fastening said carbon-holder against oscillation; and actuating means for releasing said latching-means, including a finger adapted to engage a perforation in the advancing stationery.

5. A device as specified in claim 4, in which the latching-means comprises'a trigger adapted to automatically latch the carbon-holder, when the latter is swung to its rearmost position.

6. A device as specified in claim 4, in which the latching-means comprises a trigger adapted to automatically latch the carbon-holder when the latter is moved to its rearmost position; and means for holding said trigger out of operative position after being released and until the carhon-holder is moved forwardly.

7. In combination: a typewriter equipped with a platen-roll and a forwardly movable carbonholder disposed back of said platenroll; a latchdevice for latching the carbon-holder in retracted position, equipped with a trip having an acmating-finger; and continuous-form stationery provided with a. longitudinal series of perforations adapted to engage and actuate said actuating-finger.

8. In combination: a typewriting machine having a main frame and a transversely shiftable platen carriage provided with a pivotally mounted carbon-holder, latching-means for fastening said holder against oscillation, and finger-means for releasing said latching-means; and continuous-form stationery adapted for use in said machine, said stationery having means for engaging and actuating said finger-means.

9. Mechanism as specified in claim 8, in which movable guide-means is provided to direct the stationery into engagement with the fingermeans.

10. In combination: a typewriting machine having means for feeding stationery into writing position; carbon-holding means adapted to grip the rear ends of interleaved carbon strips and. move forwardly therewith; latching-means adapted to hold said carbon-holding means against forward movement; a release device for said latching-means having an actuating finger extending into the path of the stationery; and continuous-form stationery having perforations adapted to be impaled by said finger and to actuate the same when advanced by the feeding means.

11. In combination with a typewriting machine having a main frame and a shiftable platen carriage: a track mounted on the lower rear portion of said frame; a downwardly extending supporting arm mounted on said carriage and provided with a roller adapted to engage said track; a rearwardly extending yoke mounted on said supporting arm; a carbon-holder pivotally connected to the supporting-arm so as to swing back within said yoke; a trigger pivotally mounted on said supporting-arm and adapted to latch the carbonholder against forward movement; and an upwardly extending finger mounted to release said trigger, said finger extending into the path of stationery led over said carriage and adapted to be actuated thereby.

12. Mechanism as specified in claim 11, in which the supporting-arm is provided with upwardly extending guide-fingers and a shiftably mounted guide-roller adapted to direct said stationery into engagement with the fingers.

13. In the production of multiple copies from continuous-form perforated stationery-strips and an interleaved carbon, the method which comprises: holding the carbon yieldingly to permit it to .move forward with the stationery-strips; latching the carbon to facilitate strippin action; and utilizing the perforations in the stationery-strips to effect unlatching of the carbon and permit it to be drawn forwardly with the stationery-strips.

14. Inthe production of multiple copies from continuous-form stationery-strips and an interleaved carbon, the method which comprises: yieldingly holding a carbon strip interleaved with stationery provided with a longitudinal series of perforations, to permit said carbon to move forwardly therewith; latching the carbon strip to facilitate stripping action; guiding the stationery into engagement with a finger so that a perforation will be impaled thereby; and releasing the carbon through the medium of said finger by advancing the stationery.

WALTER R. BARKER. 

